The Knight of Darkness explores deadly enigmas in the Walter Gibson thrillers that introduced Margo Lane into the Shadow pulp mythos. First, The Shadow and Margo Lane (in her pulp debut) confront the deadly lightning of "The Thunder King." Then, The Shadow investigates the strange machinations of the Secret Six whose giant sapphire, "The Star of Delhi," is the centerpiece for serial murders. BONUS: "The Witch Drums," a long-lost thriller from Orson Welles' legendary Shadow broadcasts! This volume features classic pulp covers by Graves Gladney, the original interior illustrations of Paul Orban, and historical commentary by Will Murray and Anthony Tollin.